package com.zhongen.wflow.utils;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.context.EmbeddedValueResolverAware;
import org.springframework.stereotype.Component;
import org.springframework.util.StringValueResolver;

/**
 * @author : willian fu
 * @date : 2020/5/26
 */
@Component
public class BeanUtil implements ApplicationContextAware, EmbeddedValueResolverAware {

	private static ApplicationContext applicationContext;

	private static StringValueResolver valueResolver;

	@Override
	public void setApplicationContext(ApplicationContext context) throws BeansException {
		if (BeanUtil.applicationContext == null) {
			applicationContext = context;
		}
	}

	// 获取applicationContext
	public static ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	// 通过name获取 Bean
	public static Object getBean(String name) {
		return getApplicationContext().getBean(name);
	}

	// 通过class获取Bean.
	public static <T> T getBean(Class<T> clazz) {
		return getApplicationContext().getBean(clazz);
	}

	// 通过name,以及Clazz返回指定的Bean
	public static <T> T getBean(String name, Class<T> clazz) {
		return getApplicationContext().getBean(name, clazz);
	}

	@Override
	public void setEmbeddedValueResolver(StringValueResolver stringValueResolver) {
		valueResolver = stringValueResolver;
	}

	public static String getProperties(String name) {
		return valueResolver.resolveStringValue(name);
	}

}
